package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {


    public static final String WX_LOGIN ="https://api.weixin.qq.com/sns/jscode2session";
    /**
     * 微信登录
     * @param loginDTO
     * @return
     */
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private  WeChatProperties properties;

    public User wxLogin(UserLoginDTO loginDTO) {
        //调用微信接口

        String openid = getopenid(loginDTO.getCode());


        //判断openid是否为空
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否为新用户
        User byOpenid = userMapper.getByOpenid(openid);
        //如果新用户自动注册
        if(byOpenid==null){
            byOpenid =User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();

            userMapper.insert(byOpenid);
        }
        //返回这个对象

        return byOpenid;
    }

    private String getopenid (String code){
        Map<String,String> map = new HashMap<>();
        map.put("appid", properties.getAppid());
        map.put("secret", properties.getSecret());
        map.put("grant_type", "authorization_code");
        map.put("js_code", code);
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
